8y^2-648=0

Solution for 8y^2-648=0 equation:

Simplifying
8y2 + -648 = 0

Reorder the terms:
-648 + 8y2 = 0

Solving
-648 + 8y2 = 0

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '648' to each side of the equation.
-648 + 648 + 8y2 = 0 + 648

Combine like terms: -648 + 648 = 0
0 + 8y2 = 0 + 648
8y2 = 0 + 648

Combine like terms: 0 + 648 = 648
8y2 = 648

Divide each side by '8'.
y2 = 81

Simplifying
y2 = 81

Take the square root of each side:
y = {-9, 9}